640352709601 has 8 divisors (see below), whose sum is σ = 698595340608. Its totient is φ = 582114870000.

The previous prime is 640352709587. The next prime is 640352709637. The reversal of 640352709601 is 106907253046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 640352709601 - 2⁵ = 640352709569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640352709301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915510 + ... + 1455631.

It is an arithmetic number, because the mean of its divisors is an integer number (87324417576).

Almost surely, 2^640352709601 is an apocalyptic number.

It is an amenable number.

640352709601 is a deficient number, since it is larger than the sum of its proper divisors (58242631007).

640352709601 is a wasteful number, since it uses less digits than its factorization.

640352709601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395703.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 640352709601 in words is "six hundred forty billion, three hundred fifty-two million, seven hundred nine thousand, six hundred one".